package pattern.gateway.config;

import lombok.AllArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.support.NameUtils;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.Primary;
import org.springframework.stereotype.Component;
import pattern.utils.SpringTool;
import springfox.documentation.swagger.web.SwaggerResource;
import springfox.documentation.swagger.web.SwaggerResourcesProvider;

import java.util.ArrayList;
import java.util.List;


/**
 * 聚合各个服务的swagger接口
 * 旧版本需要设置basePath 用filter 设置X-Forwarded-Prefix
 */
@Slf4j
@Component
@Primary
@AllArgsConstructor
@Import(springfox.documentation.schema.configuration.ModelsConfiguration.class)
public class SwaggerResourceConfig implements SwaggerResourcesProvider {
    private final RouteLocator routeLocator;

    /**
     * 加载gateway路由，重新组装swagger配置
     */
    @Override
    public List<SwaggerResource> get() {
        List<SwaggerResource> resources = new ArrayList<>();
        List<String> routes = new ArrayList<>();
        routeLocator.getRoutes().subscribe(route -> routes.add(route.getId()));
        SpringTool.getBean(RouteAutoRefreshConfiguration.class).getRouteDefinitionList().stream().filter(routeDefinition -> routes.contains(routeDefinition.getId())).forEach(route -> route.getPredicates().stream()
                .filter(predicateDefinition -> ("Path").equalsIgnoreCase(predicateDefinition.getName()))
                .forEach(predicateDefinition -> resources.add(swaggerResource(route.getMetadata().get("swaggerName").toString(),
                        predicateDefinition.getArgs().get(NameUtils.GENERATED_NAME_PREFIX + "0")
                                .replace("**", "v2/api-docs")))));

        return resources;
    }

    private SwaggerResource swaggerResource(String name, String location) {
        log.info("name:{},location:{}",name,location);
        SwaggerResource swaggerResource = new SwaggerResource();
        swaggerResource.setName(name);
        swaggerResource.setLocation(location);
        swaggerResource.setSwaggerVersion("2.0");
        return swaggerResource;
    }

}
